Remove remaining references to SVN.

third_party/WebKit/Tools/Scripts/webkitpy/tool/commands/auto_rebaseline.py

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """A command to download new baselines for NeedsRebaseline tests.
 
 This command checks the list of tests with NeedsRebaseline expectations,
 and downloads the latest baselines for those tests from the results archived
 by the continuous builders.
 """
@@ skipping 184 matching lines @@
         blink_tree_status_url = 'http://chromium-status.appspot.com/status'
         status = urllib2.urlopen(blink_tree_status_url).read().lower()
         if 'closed' in status or status == '0':
             return 'closed'
         elif 'open' in status or status == '1':
             return 'open'
         return 'unknown'
 
     def execute(self, options, args, tool):
         self._tool = tool
-        if tool.git().executable_name == 'svn':
-            _log.error('Auto rebaseline only works with a git checkout.')
-            return
 
         if not options.dry_run and tool.git().has_working_directory_changes():
             _log.error('Cannot proceed with working directory changes. Clean working directory first.')
             return
 
         revision_data = self.bot_revision_data(tool.git())
         if not revision_data:
             return
 
         min_revision = int(min([item['revision'] for item in revision_data]))
@@ skipping 62 matching lines @@
                     issue_already_closed = tool.executive.run_command(
                         ['git', 'config', 'branch.%s.rietveldissue' % rebaseline_branch_name],
                         return_exit_code=True)
                     if not issue_already_closed:
                         self._run_git_cl_command(options, ['set_close'])
 
                 tool.git().ensure_cleanly_tracking_remote_master()
                 if old_branch_name_or_ref:
                     tool.git().checkout_branch(old_branch_name_or_ref)
                 tool.git().delete_branch(rebaseline_branch_name)